confused about pot taper for a tonepump preamp

[goonieman]

Hi there,

the spector wiring diagram states that I would need a B250K pot for the vol control... but 'B' is linear?!

I should be going for audio right? A250K?

However, i'm concerned that the preamp has circuitry which caters for the taper, and I don't want to fiddle with factory spec...

Any ideas?

thanks

[goonieman]

No takers?

Anyone want to hazard I guess?!

[KiOgon]

Can you show the wiring diagram you're referencing?

[goonieman]

It's the one a bout one third of the page down:

http://www.talkbass.com/threads/spector%C2%AE-owners-club.1066466/page-996

cheers

[Billy Apple]

email Petr Michalik http://www.michalik.cz/contacts-en

It's him what makes them. I emailed a question about pup blend instead of vol vol. Got an answer very quickly. Seems like a nice guy.

[goonieman]

good idea. done that, cheers

[goonieman]

For the sake of posterity - turns out that I need linear after all! I was one click away from ordering audio!

From Petr - (who responded same day!)

[b]The wiring for one pickup is here:[/b]

[url="http://michalik.cz/images/pdf/bp-4_rev2_en.pdf"]http://michalik.cz/images/pdf/bp-4_rev2_en.pdf[/url]

[font=arial, sans-serif][size=3]volume pot should be audio[/size][/font]

[b]Two pickups - balance, bass, treble & volume is here:[/b]

[url="http://michalik.cz/images/pdf/bp-4_balance_rev2_en.pdf"]http://michalik.cz/images/pdf/bp-4_balance_rev2_en.pdf[/url]

[font=arial, sans-serif][size=3]this balance pot should be linear - 2x500k/B or 2x250k/B for passive pickups, 2x25k/B for active ones[/size][/font]

[b]Two pickups[/b][b] - 2[/b][b] x volume, bass & treble is here:[/b]

[url="http://michalik.cz/images/pdf/bp-4_2volume_rev2_en.pdf"]http://michalik.cz/images/pdf/bp-4_2volume_rev2_en.pdf[/url]

[font=arial, sans-serif][size=3]these volume pots should be linear, too - 500k/B or 250k/B for passive pickups, 25k/B for active ones.[/size][/font]